Solubility of salt

Which of the following is an acid?

• sodium oxide

• potassium hydroxide

• hydrochloric acid

• calcium chloride

Which of the following is a base?

• magnesium oxide

• copper(II) sulfate

• dilute nitric acid

• calcium carbonate

Name an alkali.

Which of the following is a soluble salt?

• copper(II) nitrate

• lead(II) sulfate

• silver chloride

• sodium chloride

• magnesium sulfate

Which of the following is an insoluble salt?

• potassium sulfate

• barium sulfate

• calcium nitrate

• lead(II) chloride

• copper(II) carbonate

What is the state symbol used to represent soluble salt in a chemical equation?

• (s)

• (l)

• (g)

• (aq)